tonight, president obama will deliver the first state of the union address of his second term. The white house programs to focus on the economy. The audience will be packed with victims of gun violence and advocates of gun rights. Jon karl will be there, too. Most of the words will be about jobs. But most of the emotion will be around guns. Reporter: That's a good way to look at this, george. There will be victims of gun violence throughout the visitors' gallery, including in the first lady's box. Someone tied to t massacre. And each member of congress, they have one ticket for a guest. They will be giving many of their tickets to victims of gun But the message is all about the economy. The president wants to drive home who has been a theme of his, which is the middle class is the driver of economic growth. And in a challenge to republicans saying, we cannot cut our way to prosperity, look for new initiatives, new spending in this speech, to stimulate economic growth. And the answer will come from the republicans, senator marco rubio. He's a rising star, the senator from florida. Reporter: That's right. His speech will be entirely in english. But he is pretaping an entire response in spanish that will go out on the spanish language networks. Rubio's message will also be about the economy. He's leading the charge for republicans on immigration. That will be mentioned in the speech. His challenge will be to the president saying, we need a smaller government, maybe a more efficient government. But a smaller government. And there will be a separate tea party response from senator rand paul. Diane sawyer and I will anchor the coverage of the state of the union at 9:00 p.M. Eastern, 6:00 pacific.

This transcript has been automatically generated and may not be 100% accurate.

Don't Know Much About the State of the Union

Once not even a speech, the rituals and strange pageantry came later.

Nicolle Wallace: The State of the Union is...

Nicolle Wallace, ABC News political analyst, on what the State of the Union is.

{"id":18474627,"title":"State of the Union 2013: All About the Economy","duration":"1:40","description":"Jon Karl discusses what is expected during Obama's State of the Union address.","section":"GMA","mediaType":"Default"}